WO2023093935A1 - Machine électrique comprenant un stator et un support conducteur disposé à une extrémité axiale du stator - Google Patents

Machine électrique comprenant un stator et un support conducteur disposé à une extrémité axiale du stator Download PDF

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Publication number
WO2023093935A1
WO2023093935A1 PCT/DE2022/100821 DE2022100821W WO2023093935A1 WO 2023093935 A1 WO2023093935 A1 WO 2023093935A1 DE 2022100821 W DE2022100821 W DE 2022100821W WO 2023093935 A1 WO2023093935 A1 WO 2023093935A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
stator
section
sealing
electrical machine
Prior art date
Application number
PCT/DE2022/100821
Other languages
German (de)
English (en)
Inventor
Jens BOHNEN
Christian Morgen
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN202280076912.XA priority Critical patent/CN118285045A/zh
Publication of WO2023093935A1 publication Critical patent/WO2023093935A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs

Definitions

  • the invention relates to an electrical machine comprising a stator and a conductor support arranged on an axial end of the stator.
  • Electrical machines are used in many different ways in technology and can be used, for example, as traction motors in motor vehicles. Since this requires a comparatively high output from the electric machine, it may be necessary to cool the electric machine during operation. This can be implemented, for example, by cooling the stator of the electrical machine using liquid cooling. It may be desirable to limit the cooling to the stator so that the rotating rotor of the electric machine does not come into contact with the liquid coolant. In the electrical machine, this requires the stator to be sealed off from the rotor or from the air gap between the rotor and the stator. Furthermore, the stator must also be sealed off from the surroundings of the electrical machine.
  • sealing elements can be provided on the electrical machine. These sealing elements are used to seal the stator, for example from open stator slots facing the rotor in a laminated core of the stator. This makes it possible for the stator windings arranged in the stator slots to be cooled using a cooling liquid which, because of the sealing element, cannot penetrate into the air gap or to the rotor.
  • a sealing element extending axially through the electrical machine must be sealed in each case in a sealing manner on the two axial end faces of the stator on further components of the electrical machine.
  • the sealing element can be attached to a housing and/or to end shields fixed to the housing. Since in the area of the end faces, however, other components of the electrical machine, for example busbars for connecting the stator winding or the like, have to be arranged, there is a need for a compact and, in particular, easy-to-install seal for the electrical machine.
  • the invention is therefore based on the object of specifying an improved electrical machine which, in particular, enables improved sealing of a stator of the electrical machine.
  • the conductor carrier comprises an annular sealing section and an annular or ring-segment-shaped conductor carrier section, the sealing section having a first seal facing axially toward the stator and a second seal facing away axially from the stator wherein the first seal rests on a sealing element that is arranged on the stator and seals the stator against a radially adjacent air gap, and the second seal rests at least in sections on at least one cover that at least partially encloses the conductor carrier section and/or the axial end of the stator.
  • the conductor carrier which is arranged at an axial end of the stator, can thus advantageously fulfill several functions.
  • the sealing section of the conductor carrier serves to seal the stator of the electrical machine, in particular with respect to the rotor space.
  • the sealing section comprises the first seal, which faces axially towards the stator and which bears against the sealing element which is arranged in particular in the interior of the stator and seals the stator against the air gap.
  • the sealing via the first seal of the sealing section takes place on a first axial end face of the stator.
  • a design of the electrical machine is also possible in which the sealing element seals the stator against an air gap lying radially on the outside.
  • sealing is effected by the seal of the sealing section in the axial direction on an end face of the stator.
  • the sealing element can in particular be a can, which bears against the inner circumference of the in particular hollow-cylindrical stator and in particular closes the inwardly open stator slots with respect to the air gap.
  • a coolant used to cool the stator and in particular the stator windings cannot therefore escape into the air gap.
  • the rotor which is separated from the stator by the air gap, can thus rotate unaffected by a coolant, it being possible in particular to avoid churning losses during operation.
  • sealing elements for example an insulating coating, an adhesive coating and/or a sealing film or the like, can also be used.
  • the sealing element can also provide electrical insulation between the stator and the rotor.
  • a seal can be made with respect to the sealing element when the electrical machine is assembled.
  • the first seal can rest in particular on the inner diameter or on the end face of the sealing element. It is also possible for the seal to bear against the sealing element from the radial outside.
  • the stator is also sealed by means of a further sealing arrangement which also bears against the sealing element.
  • the second seal of the sealing section creates a sealing connection to one or more covers, which at least partially enclose the at least one conductor carrier section and/or the axial end of the stator.
  • the liquid-filled wet space that at least partially surrounds the stator can also be sealed off at the axial end of the stator by the at least one cover.
  • This sealing connection can also be produced in a simple manner during the assembly of the electric machine by providing the second seal on the side of the conductor carrier facing away from the stator.
  • the conductor support section of the conductor support advantageously also fulfills the function of positioning electrical conductors fixed to the housing, such as Busbars, which are required to connect the windings of the stator windings.
  • electrical conductors fixed to the housing such as Busbars
  • Busbars electrical conductors fixed to the housing
  • These can be connected to one another via the conductor carrier section of the conductor carrier, or via conductors arranged in the conductor carrier section, and in particular can be combined to form a plurality of phase outputs of the electrical machine.
  • the ends of the winding strands to be connected can be arranged around the entire circumference of the electrical machine or only around a partial area of the circumference of the stator.
  • a ring-shaped or a ring-segment-shaped conductor carrier section can be used in order to arrange the conductors required for connecting the ends of the winding strands on the electrical machine.
  • the conductor carrier with the ring-shaped sealing section which has a comparatively large contact area with other components of the electrical machine, advantageously enables precise positioning of the conductor carrier and thus also precise alignment of the sealing section and the conductor carrier section during assembly of the electrical machine.
  • This can ensure that the first seal and the second seal each enter into a sealing connection with the sealing element or the at least one cover and that the conductor carrier section has the correct orientation in relation to the windings to be connected.
  • the number of components of the electrical machine can advantageously be reduced. This has an advantageous effect on the costs of manufacturing the electrical machine and reduces the effort involved in assembling it.
  • the second seal rests completely on a cover element that encloses the conductor carrier section and at least a section of the axial end of the stator, or that the second seal rests with one section on a cover element that covers the conductor carrier section and with at least one other section on a housing of the electrical machine and/or a bearing plate of the electrical machine.
  • Both a cover element and the housing and the end shield can serve as a cover for at least one section of the axial end of the stator and/or for the conductor carrier section.
  • Both variants enable the stator or a wet space surrounding the stator to be completely sealed at the axial end of the stator on which the conductor carrier is arranged. The wet space is sealed at the axial end both from the rotor and from the environment of the electrical machine, so that a coolant used to cool the stator, for example an insulating cooling oil or the like, remains inside the wet space.
  • the conductor carrier can thus provide sealing functional surfaces, which enable sealing against the sealing element in the stator as well as against the cover or against the housing, the end shield and/or a cover element that separately covers the conductor carrier section.
  • the direct contact between the second seal on the side of the seal section facing away from the stator axially with a cover, the end shield and/or with the housing of the electrical machine also advantageously results in a centering of the sealing element inside the electrical machine during assembly of the electrical machine Machine.
  • the stator has at least one stator winding, with a sealing element and the sealing section of the line carrier being inserted at the axial end of the stator Wet space is sealed, which comprises the stator winding and at least one or more conductors arranged on the conductor support section.
  • the lines arranged on the conductor carrier section can in particular be designed as busbars.
  • Such a wet room advantageously allows the liquid cooling of the stator to also be used for the conductors on the conductor carrier. Due to the sealing by the axially offset arranged seals of the sealing section, the conductors of the conductor carrier section can be arranged in a simple manner within the wet space, particularly when the conductor carrier section is arranged axially between the first seal and the second seal. In this way, direct dissipation of the heat generated there during operation of the electrical machine is advantageously made possible. This increases the machine efficiency and allows the use of less heat-resistant and therefore less expensive materials, as a result of which the electrical machine can advantageously be manufactured more cost-effectively.
  • first seal and the second seal are annular and/or that the first seal and the second seal are each arranged in an annular groove of the sealing section.
  • the first seal and the second seal run in particular in the circumferential direction of the electrical machine or in a plane orthogonal to the axial direction of the electrical machine.
  • the sealing element that seals the stator which in particular has a hollow-cylindrical shape, can accordingly have a cylindrical sealing surface that runs in the circumferential direction of the electrical machine and is arranged at the axial ends of the stator, which is therefore in direct contact along its entire circumference with the first seal of the Sealing section can be arranged.
  • the second, ring-shaped seal at the opposite axial end of the conductor support section ie towards the outer end of the machine, enables at least a substantially ring-shaped sealing of the wet space surrounding the stator.
  • the first seal may have a larger diameter than the second seal.
  • the ring-shaped sealing section of the conductor support can have a section with a larger outside diameter and/or a larger inside diameter on a first side facing axially toward the stator than on a second section on the second side facing away axially from the stator, on which the second seal is arranged is.
  • the first seal and the second seal are in particular each arranged in an annular groove of the sealing section, the grooves each also extending in the circumferential direction of the electrical machine or in the plane orthogonal to the axial direction of the electrical machine.
  • the groove of the first seal and the second seal are offset from one another in the axial direction of the electrical machine.
  • the first seal and the second seal can be arranged in particular on an outer circumference of the ring-shaped seal section. The first seal can bear against the sealing element radially from the inside.
  • the second seal can also provide a radial seal against a cover of the conductor support section and/or a cover of the axial end of the stator, with the second seal also bearing radially from the inside against at least one corresponding sealing surface of the at least one cover.
  • the first seal can also bear against the sealing element radially from the outside, for which purpose it can be arranged, for example, on an inner circumference of the annular sealing section.
  • the first seal and the second seal can each be designed as a seal, in particular as an O-ring, as a metered-in seal or as a molded-on seal.
  • the first and/or the second seal can each be designed as a rubber O-ring.
  • Other shaped sealing rings with a non-circular cross-section can also be used for the first seal and/or the second seal.
  • the first seal and/or the second seal can each also be formed by injecting or metering a sealing compound, in particular into an annular groove of the sealing section of the conductor carrier.
  • the conductor carrier section and the sealing section consist of an electrically insulating material, in particular a plastic.
  • electrically insulating means that the conductor carrier section and the sealing section each have a sufficiently low electrical conductivity to insulate the operational voltages present on the stator from a housing and/or an end shield and the conductors carrying the different potentials, in particular in the conductor carrier section. to isolate from each other.
  • the different phase outputs are at different electrical potentials during operation of the electrical machine.
  • the conductors which are used to connect the phase windings assigned to the individual phases, are spatially relatively close together in the conductor carrier section, so that sufficient insulation using electrically insulating materials is required.
  • the provision of a conductor carrier section made of an electrically insulating material thus enables electrical insulation of the conductors from one another and electrical insulation from other components of the electrical machine, in particular from a housing and/or an end shield, which are each made of a metallic material can.
  • the electrically insulating sealing section enables sufficient insulation distances between a winding overhang protruding axially from the stator and a rotor as well as other conductive components, such as a housing and/or an end shield.
  • Both the sealing section and the conductor carrier section are preferably made of an electrically insulating material, in particular in one piece as a single component.
  • a cover element which at least partially encloses the conductor carrier section and which can be in contact with the second seal in sections can also be designed to be electrically insulating in particular, in order to provide additional insulation of the conductors arranged in the conductor carrier section from other conductors To effect machine components, in particular a housing and / or an end shield.
  • This cover element can in particular be designed as a separate component so that the conductor carrier section and the conductors arranged therein are accessible during assembly.
  • the conductor carrier section and the sealing section can be made of a plastic, which means that their electrically insulating properties can be produced in a simple manner. Furthermore, the production from plastic allows a simple production and in particular also the possible formation of annular grooves in the sealing section for receiving the first and the second seal.
  • the conductor carrier section and the sealing section can be manufactured, for example, by means of a plastic injection molding process, in particular by manufacturing a one-piece plastic injection molded part that forms both the conductor carrier section and the sealing section.
  • the conductor carrier section has a plurality of slot-shaped, radially adjacent receiving sections, with at least one busbar being arranged in each of the receiving sections.
  • the receiving sections are in particular circular or circular segment-shaped, corresponding to the shape of the conductor support section, and they accordingly extend over the entire or only a section of the circumference of the stator of the electrical machine.
  • the slot-shaped receiving sections can be open at an axial end of the conductor carrier section, in particular the axial end facing the second seal, so that busbars can be inserted into the receiving sections.
  • insulation of the busbars in particular each carrying a different phase potential, can be achieved.
  • a star point rail can also run in the conductor support section, which is connected to the phases of the electrical machine to form a star connection of the phases. According to the invention, it can be provided that two adjacently arranged receiving sections are each separated by a web section extending in the axial direction, with the web section protruding in the axial direction beyond the busbars arranged in the receiving sections.
  • the conductor carrier section has at least one phase connection, in particular three phase connections.
  • the phase connections are connected to the phase windings of the stator winding in particular via conductors or the busbars in the conductor support section.
  • the stator of the electrical machine can be supplied with current via the phase connections, in particular with a three-phase alternating current.
  • the invention also relates to a conductor carrier for an electrical machine according to the invention, the conductor carrier comprising an annular sealing section and an annular or ring-segment-shaped conductor carrier section, the sealing section having a first seal and a second seal, the first seal and the second seal being axially offset on the Sealing section are arranged.
  • the first and the second seal of the conductor carrier can be annular and/or each be arranged in an annular groove of the sealing section.
  • the first seal and the second seal are each designed as a seal, in particular as an O-ring, as a metered-in seal or as a molded-on seal.
  • the conductor carrier section and the sealing section of the conductor carrier can consist of an electrically insulating material, in particular a plastic.
  • the conductor carrier section can have a plurality of slot-shaped, radially adjacent receiving sections, with at least one busbar being arranged in each of the receiving sections.
  • two adjacently arranged receiving sections are each separated by a web section extending in the axial direction, the web section protruding in the axial direction beyond the busbars arranged in the receiving sections.
  • the conductor carrier section can have at least one phase connection, in particular three phase connections.
  • Figure 1 shows an embodiment of an electrical machine in a perspective sectional view
  • FIG. 2 shows an exploded view of the exemplary embodiment of the electrical machine according to the invention
  • FIG. 3 shows an exemplary embodiment of a conductor support according to the invention of the electrical machine according to the invention
  • FIG. 4 shows a view of the rear side of the conductor carrier according to the invention, facing towards the stator
  • FIG. 5 shows a further view of the conductor carrier according to the invention with busbars and phase connections arranged on the conductor carrier section
  • FIG. 6 shows the arrangement of the conductor carrier according to the invention on the stator of the electrical machine according to the invention
  • FIG. 7 shows a sectional view of the axial end of the exemplary embodiment of the electrical machine according to the invention with the conductor support according to the invention
  • FIG. 8 shows a perspective view of a bearing plate of the electrical machine according to the invention with an exemplary embodiment of a seal carrier according to the invention
  • FIG. 9 shows a view of the exemplary embodiment of the seal carrier according to the invention.
  • FIG. 10 shows a sectional view of the seal carrier according to the invention arranged on the end shield
  • FIG. 11 shows a detailed view of a further exemplary embodiment of a seal carrier according to the invention for an electrical machine according to the invention
  • FIG. 12 shows a perspective view of a transmission connection element of an electrical machine according to the invention.
  • FIG. 13 shows a perspective view of the transmission connection element mounted on the electric machine according to the invention.
  • FIG. 1 shows an exemplary embodiment of an electrical machine 1 according to the invention.
  • the electrical machine 1 comprises a housing 2 in which a stator 3 is accommodated.
  • the stator 3 comprises a stator core 4 formed, for example, from a laminated core and a stator winding 5 which comprises a plurality of phase windings and which extends through the stator core 4 .
  • the housing 2 and the stator 3 are arranged coaxially along a longitudinal axis 6 extending in the axial direction of the electrical machine 1 .
  • the housing 2 and the stator 3 are each designed in the form of a hollow cylinder in this exemplary embodiment.
  • the term “hollow-cylindrical” also includes shapes that are essentially hollow-cylindrical.
  • essentially hollow-cylindrical shapes can have an uneven inner and/or outer lateral surface.
  • a slight cone shape, ie a radius that changes slightly along the axial length, is also possible.
  • the conductors of the stator winding 5 extend out of the stator 3 at a first axial end 7 of the latter and form one or more winding overhangs 8 there.
  • the conductors of the stator winding 5 also form one or more winding overhangs 8 at the second axial end 9 of the stator 3.
  • the stator winding 5 can be designed as a distributed winding, for example as a wave winding. Other designs of the stator winding 5 are also possible.
  • the number and shape of the end windings 8 at the axial ends 7, 9 of the stator 3 is particularly dependent on the winding pattern of the stator winding 5.
  • the end shield 10 limits the electric machine 1 to the outside. Also at the second end 9 of the electrical machine 1, which is correspondingly on the left-hand side in FIG.
  • the stator 3 of the electrical machine 1 includes liquid cooling.
  • the stator 3 is at least partially enclosed in a wet space 13 in the interior of the electrical machine 1 .
  • the wet space 13 is at least partially delimited by the stator core 4 and in the area of the end windings by the end shields 10, 12.
  • the provision of the wet space 13 enables a coolant, in particular a liquid coolant, to flow through the stator winding 5, with the coolant flowing in particular through the slots in the stator core 4, in which the conductors of the stator winding 5 are arranged, and/or between the conductors of the stator winding 5.
  • a coolant in particular a liquid coolant
  • the wet space 13 is delimited by a sealing element 15 .
  • the slots of the stator core 4 that are open radially through the stator and towards the air gap 14 are sealed by the sealing element 15 , so that a cooling liquid located in the wet space 13 can flow along the stator winding 5 without escaping into the air gap 14 .
  • the wet space 13 or the liquid-cooled stator 3 can thus advantageously be sealed off from a rotor of the electric machine 1, so that the rotor does not come into contact with the coolant when the electric machine 1 is in operation. As a result, splashing losses can be avoided, which advantageously increases the efficiency of the electrical machine 1 .
  • a conductor carrier 16 is arranged on the first axial end 7 of the stator 3 in order to seal off the wet space 13 .
  • Conductor carrier 16 permits sealing with respect to sealing element 15 and with respect to at least one cover arranged in the region of first axial end 7 of stator 3, in particular a separate cover element 52, end shield 10 and/or a section of housing 2.
  • the structure of conductor carrier 16 is explained in more detail below with reference to FIGS.
  • the sealing element 15 can preferably be designed as a can, for example made of a glass fiber reinforced plastic. Alternatively, a different design of the sealing element 15 can be used, for example a design as insulating coating, as an adhesive coating and/or as a sealing film.
  • the sealing element can have a thickness of between 0.5 mm and 1 mm, for example 0.7 mm.
  • sealing against the sealing element 15 takes place via a sealing arrangement 17 which is fastened to the bearing plate 12 .
  • the structure of the sealing arrangement 17 is explained in more detail below with reference to FIGS.
  • a transmission connection element 18 which enables the electrical machine 1 to be connected to a transmission.
  • the transmission connecting element 18 can at least partially enclose a transmission coupled to the electric machine 1 .
  • the transmission connection element 18 is explained in more detail below with reference to FIGS.
  • the stator 3 is connected to a fastening section 20 of the transmission connection element 18 along a fastening plane 19 in the interior of the electric machine 1 .
  • the stator 3 is connected by gluing the stator core 4 to the fastening section 20 of the transmission connecting element 18 the attachment portion 20 of the transmission connection element 18 can be glued.
  • the insulating ring 21 is in contact with an axial end face of the stator core 4 .
  • the stator 3 has an insulating ring 22 which is arranged on an axial end face of the stator core 4 .
  • the stator 3 is supported on an inner side 25 of the hollow-cylindrical housing 2 via two centering sleeves 23 , 24 .
  • the centering sleeves 23, 24 are designed as annular plastic elements and allow use of the stator and its alignment or positioning in the housing 2.
  • a gap between the centering sleeves 23, 24 remaining between Stator core 4 and housing 2 ensure sufficient clearance and creepage distances for insulating stator 3 from housing 2.
  • the insulation rings 21, 22 and the centering sleeve 23, 24 can be designed as separate, each ring-shaped components. It is also possible that the insulating ring 21 and the centering sleeve 23 and the insulating ring 22 and the centering sleeve 24 are each designed as a common component with an L-shaped cross section.
  • the insulation rings 21, 22 and the centering sleeves 23, 24 consist of an electrically insulating material, in particular a plastic, and can be manufactured, for example, by means of an injection molding process.
  • the insulating ring 21 enables the stator 3 to be axially supported on the second axial end 9 of the stator 3, in particular against the transmission connection element 18 fixed to the housing Section 88 of housing 2 pointing radially inwards.
  • One or more sealing elements 89 can be provided on section 88, which enable sealing of wet space 13 at the contact surface between stator 3 and housing 2 along section 88.
  • the insulation rings 21, 22 and/or the centering sleeves 23, 24 can be attached to the stator core 4 by gluing, for example using an epoxy resin.
  • the insulating support of the stator 3 in the housing 2 advantageously makes it possible to dispense with insulating means such as insulating paper or the like arranged in the slots of the stator.
  • the space gained in this way can be used for the flow of the coolant, for example an insulating cooling oil, through the slots or through the stator winding 5, so that the cooling channels can advantageously be realized without a reduced cross-section of the sheet metal of the stator core 4 and without reduced copper cross-sections of the stator winding 5 becomes.
  • the coolant for example an insulating cooling oil
  • FIG. 2 shows the structure of the electrical machine 1 in an exploded view.
  • the rotor 25 of the electrical machine 1 is also shown.
  • the air gap 14 is formed between the rotor 25 and the radially inner inner circumference of the stator 3 formed by the sealing element 15 .
  • a connecting element 26 designed as a coolant connection piece, which can be connected to a corresponding opening 27 in the transmission connecting element 18 and a corresponding opening 28 in the bearing plate 12 in order to enable coolant to be supplied to the stator 3 or to the wet space 13 surrounding the stator 3 .
  • One or more additional sockets can also be arranged on the electric machine 1, via which it is also possible to supply or discharge coolant to the wet space 13.
  • the electric machine 1 can be designed for use as a traction electric motor in a motor vehicle, for example.
  • the electrical machine 1 can be designed to generate mechanical power between 50 kW and 500 kW, in particular between 100 kW and 200 kW, for example 150 kW
  • the conductor carrier 16 comprises an annular sealing section 29 and a conductor carrier section 30 in the form of a ring segment.
  • the sealing section 29 has a first seal 31 and a second seal 32 .
  • the first seal 31 is arranged on a first axial end 33 of the sealing section 29 and faces axially towards the first axial end 7 of the stator 3 in the assembly position of the conductor carrier 16 .
  • the second seal 32 is arranged at the opposite axial end 34 of the sealing section 29, so that in the assembled position of the Conductor support 16 is arranged on the side of the conductor support 16 facing away from the stator 3, that is to say facing the end shield 10.
  • the first seal 31 and the second seal 32 are each arranged on an outer periphery of the seal portion 29 .
  • the sealing section 29 has a smaller outside diameter at its axial end 34 or on an outer cylinder surface 96 in the area of the second seal 32 , so that the second seal 32 also has a smaller diameter than the first seal 31 .
  • the section of the sealing section 29 adjoining the axial end 34, at the end 33 of which the first seal 31 is arranged, correspondingly has a cylindrical surface 95 with a larger outer diameter than the cylindrical surface 96.
  • the first seal 31 and the second seal 32 are each designed as an O-ring and are inserted into an annular groove 53 and 54 of the sealing section 29, respectively.
  • the grooves 53, 54 also run annularly around the outer circumference of the sealing section 29.
  • the first seal 31 and the second seal 32 can also be a molded seal be carried out, which can be generated, for example, by injecting or metering a sealing compound into the grooves 53, 54.
  • the sealing section 29 of the conductor carrier 16 is in contact with the sealing element 15, which seals the stator 3 against the radially inner air gap 14.
  • the second seal 32 rests at least in sections on a cover element (not shown here), which encloses the conductor carrier section 30 after the conductor carrier 16 has been arranged in the electrical machine 1 .
  • the cover element is also in the form of a ring segment and extends essentially over the same segment of a circle as the conductor carrier section 30, so that the second seal 32 rests with a section 35 on the cover element, which is not shown in FIG.
  • the seal section 29 rests against the end shield 10, which at least partially encloses the second axial end 9 of the stator.
  • the conductor carrier section 30 it is possible for the conductor carrier section 30 to extend over a larger or smaller part of the circumference of the stator 3 or of the electrical machine 1 .
  • a ring-shaped design of the conductor carrier section 30 is also possible.
  • the sections 35, 36 with which the sealing section 29 bears against the cover element or the bearing plate of the electrical machine 1 increase or decrease in size.
  • direct contact can also be made between the second seal 32 or its second section
  • the sealing section 29 and the first seal 31 and the second seal 32 of the conductor carrier 16 seal off the wet space 13 of the electrical machine 1 .
  • the coolant flowing around the stator is thus kept within the wet space 13, penetration or leakage of the coolant into the air gap 14 and/or onto the rotor 25 is thus avoided.
  • the coolant can also be prevented from escaping from the interior of the electrical machine 1 to the outside by the conductor carrier 16 or its sealing section 29 in the region of the first axial end 7 of the stator 3 .
  • the conductor carrier section 30 of the conductor carrier 16 comprises a plurality of slot-shaped, ring-segment-shaped receiving sections which run radially adjacent to one another
  • a conductor rail (not shown here) is arranged in each of the receiving sections 37.
  • the individual phase windings of the stator winding 5 can be connected to one another via the busbars.
  • Two adjacently arranged receiving sections 37 are each separated by a web section 38 .
  • the web section 38 is designed to be longer in the axial direction than the busbars in the receiving sections 37, so that an air gap and a creepage distance between the axial end faces of adjacent busbars are increased. In this way, the isolation between the busbars arranged in the receiving sections 37 can be improved.
  • the receiving space 41 serves to receive part of the end winding 8 at the first end 7 of the stator 3.
  • An axial bearing surface 46 is provided between the first seal 31 and the second seal 32, via which the seal carrier 16 can be supported axially, for example on a section of the housing 2 and/or can rest against the end shield 10.
  • FIG. 4 shows a view of the side of the conductor carrier 16 pointing towards the stator 3 .
  • the conductor carrier section 30 has an axial contact surface 42 with which the conductor carrier 16 bears against an end face of the stator 3 at its first end 7 .
  • axial contact with a section of the housing 2 that extends into the corresponding area is also possible, with this section being able to be machined in particular to form a defined alignment of the arranged conductor carrier 16 .
  • the radially outer section 43 of the conductor carrier section 30 has the shape of a cylinder jacket segment and serves as a radial center surface for arranging the conductor carrier 16 on the housing 2 of the electrical machine 1 .
  • the bearing support 16 can also have an anti-twist device, which can be designed, for example, as a recess 44 in the circumferential direction.
  • centering aids 45 which are designed for example as bulges, can be provided.
  • busbars 47 are used in the receiving sections 37, of which several welding tabs 48 can be seen, which in the axial Protrude direction from the conductor carrier portion 30.
  • the receiving sections 37 form positioning areas for the conductor rails 47, so that there is a defined association between the welding lugs 48 and the conductor ends of the phase windings to be connected.
  • phase connections 49 via which the phase windings of the stator winding 5, which form a three-phase winding, can be contacted.
  • a star point rail 50 which connects the various phases of the stator winding 5 in a star connection.
  • the conductor carrier 16 is shown in its assembly position on the stator 3 in FIG. In this case, the conductor carrier 16 is arranged on the first end 7 of the stator 3 . As can be seen, the conductor carrier 16 rests with the axial contact surface 42 on an end face 51 of the stator 3 . The end winding 8 protruding outwards in the axial direction from the axial end face 51 of the stator 3 runs inside the conductor carrier section 30 in the recess 41. The side of the conductor carrier section 30 pointing axially outwards is covered by a cover element 52, which has a contact surface in the form of a ring segment its inside diameter rests against the section 35 of the second seal 32 .
  • the cover element 52 comprises a first section 90 in the form of a ring segment, which covers the conductor carrier section 30 , and an annular second section 91 , which extends along the second section 36 of the second seal 32 .
  • the cover element 52 rests against a section of the axial contact surface 46 on the conductor carrier.
  • the cover element 52 is electrically insulating and can be designed, for example, as an injection-molded plastic component. It is also possible for the first section 90 and the second section 91 to be manufactured as separate components or cover elements and/or for the second section 91 to be designed as part of the end shield 10 and/or the housing 2 . Thus, only the phase connections 49 of the conductor support section 30 are accessible from the outside after the cover element 52 has been arranged.
  • phase connections 49 remain accessible from the outside even after the conductor carrier 16 has been arranged on the end shield 10 , so that the electrical machine 1 can be supplied with current via the phase connections 49 .
  • further seals and/or sealing elements can be provided in the area of the phase connections 49 , which also seal the wet space 13 at the phase connections 49 .
  • FIG. 1 A sectional view of a section of the electrical machine 1 is shown in FIG.
  • the conductor carrier 16 is arranged between the stator 3 and the bearing plate 10 as can be seen.
  • the conductor carrier 16 rests against the sealing element 15 via the first seal 31 .
  • the conductor carrier 16 bears against the cover element 52 via the second seal 32 .
  • the cover element 52 is in turn supported on the end shield and sealed there, for example by a seal 92 .
  • the end shield 10 is sealed off from the housing at the radially outer end by means of a seal 93 arranged adjacent to the screw connection 11.
  • the first seal 31 rests against the sealing element 15 from radially inside.
  • the second seal 32 also bears against the cover element 52 from the radially inner side.
  • the conductor support 16 is arranged in the interior of the electrical machine 1 via two cylinder surfaces 95, 96 of the sealing section 29, on each of which one of the seals 31, 32 is arranged. These cylindrical surfaces 95, 96 can advantageously be machined in the same method step or in the same clamping of the conductor carrier 16, so that a precise alignment of the conductor carrier 16 can be achieved, particularly in combination with the anti-rotation device described above. The precise alignment improves the sealing function of the conductor carrier 16 produced by overlapping.
  • sealing of the sealing element 52 by the first seal 31 from the radially outer side is also possible.
  • the wet space 13 is sealed off by the sealing section 29 of the conductor support 16 , the cover element 52 and the bearing plate 10 .
  • the busbars 47 and the neutral point busbar 50 which run in the conductor support section 30 of the conductor support 16, are also arranged within the wet space 13, so that they are advantageously also cooled by a coolant circulating in the wet space 13 can become.
  • the connection between two of the welding lugs 48 and one conductor end 94 of a phase winding of the stator winding 5 can also be seen.
  • Sufficient electrical insulation of the electrical machine 1 in the area of the conductor carrier 16 is achieved by making the sealing section 29 and the conductor carrier section 30 from an electrically insulating material.
  • the individual busbars 47 are additionally insulated from one another by the web sections 38, which protrude beyond the busbars 47 in the axial length. Sufficient gaps for insulation are provided between the star point bar 50 and the axially outer end of the end winding 8 .
  • the cover element 52 which encloses at least the conductor carrier section 30, is also made of an electrically insulating material and ensures the insulation, in particular between the welding lugs 48 and the bearing plate 10, which can be made of an electrically conductive material such as a metallic material.
  • the conductor carrier 16 can ensure insulation of the housing 2, the end shield 10 and the rotor 25, which is optionally electrically conductively connected to other components via a shaft, even in the event of a defect in a winding insulation of the stator winding 5.
  • FIG. 8 shows a detailed view of the end shield 12 arranged in the area of the second end 7 of the stator 3 .
  • An exemplary embodiment of a sealing arrangement 17 is arranged on the end shield 12 .
  • the sealing arrangement 17 comprises an annular seal carrier 55, which comprises at least one seal 56, with which the sealing arrangement 17 rests against the sealing element 15, which seals the stator against the radially inner air gap.
  • the seal 56 runs on the outer circumference of the ring-shaped seal carrier 55 and thus bears radially on the inside against the sealing element 15 of the electrical machine 1 .
  • the ring-shaped seal carrier 55 is arranged concentrically around an opening 57 in the bearing plate 12, in which a rotor shaft of the electrical machine 1 can be accommodated.
  • the sealing arrangement 17 seals off the wet space 13 from the rotor 25 arranged in the dry interior of the electrical machine 1.
  • the seal carrier 55 is fastened to the bearing plate 12 in a form-fitting and non-positive manner and for this purpose comprises a plurality of latching elements 58 which are arranged offset in the circumferential direction and protrude in the axial direction and which engage in corresponding receptacles 59 of the bearing plate 12 .
  • the latching elements 58 are arranged in particular equidistantly along the outer circumference of the seal carrier 55, so that a stable and secure attachment of the seal carrier 55 to the end shield 12 is made possible.
  • the latching elements 58 are shaped like hooks or claws, so that the seal carrier 55 can be clipped onto the end shield 12 in the axial direction during the assembly of the electrical machine 1 .
  • the seal carrier 55 consists in particular of an electrically insulating material in order to increase an insulating distance between the end shield 12 and the end winding 8 at the second end 9 of the stator.
  • the bearing plate 12 is fastened via radially outward-pointing fastening sections 60 of the bearing plate 12, which enable a connection to the housing 2 of the electrical machine 1 via the screw connections 11 shown in FIGS.
  • the fastening sections 60 protrude radially outwards on an end face of the bearing plate 12 which faces the second end 9 of the stator 3 in the assembled position.
  • the side 61 of the sealing element 55 facing the stator 3 comprises a plurality of recesses 62 arranged offset in the circumferential direction Injection molding process is facilitated.
  • the injection points for the injection molding process can also be arranged in the recesses 62, for example, so that the side 61 facing the stator can be designed to be flat, in particular without further post-processing. This ensures that the seal carrier 55 does not come into contact with the rotor 25 of the electrical machine 1, which rotates during operation.
  • the seal carrier 55 is shown in FIG. As can be seen, the latching elements 58 are arranged equidistantly around the outer circumference on an end face of the sealing element 55 .
  • the seal 56 which runs along the outer circumference of the sealing element 55 in the shape of a cylinder jacket, can also be seen.
  • the seal 56 includes a first seal section 63, which is arranged on the outer circumference of the seal carrier 55 and serves to seal against the sealing element 15 running inside the stator.
  • the seal 56 includes a second seal section 64 which is arranged on the inner circumference of the seal carrier 55 and serves to seal the seal carrier 55 against the bearing plate 12 .
  • the second sealing section 64 extends along a centering surface 97 in the shape of an annular disk, with which the seal carrier 55 bears against the bearing plate 12 and via which, during the assembly of the electric machine 1, a precise alignment of the seal carrier 55 and in particular also of the seal 56 or its first sealing portion 63 is made possible.
  • the first sealing section 63 and the second sealing section 64 can be manufactured in an injection molding process, for example.
  • an elastomer can be injected into annular grooves 65, 66 of the seal carrier and then heated or hardened.
  • the groove 65 and the groove 66 can be replaced by one or more Connecting sections 67 are connected so that when the seal carrier 55 is placed in a mold, the first seal section 63 and the second seal section 64 of the seal 56 can be injected simultaneously.
  • the grooves 65 , 66 are correspondingly connected via the connecting sections 67 , so that the injected sealant can form the desired sealing sections 63 , 64 in both grooves 65 , 66 .
  • the seal carrier 55 has a stop 99 formed from a plurality of radial elevations, which fixes the sealing element 15 axially.
  • the stop 99 it is also possible for the stop 99 to be formed by a single, ring-shaped or ring-segment-shaped, radial elevation.
  • FIG. 10 shows a sectional view through the bearing plate 12 and the sealing arrangement 17, with a rotor bearing 71 in the area of the opening 57, on which a shaft (not shown) connected to the rotor 25 of the electrical machine 1 is mounted against the bearing plate 12 can, is shown.
  • the seal 56 extends with its first sealing section 63 through the groove 65 and with the second sealing section 64 through the groove 66.
  • the grooves 65 and 66 are communicatively connected to one another by the connecting section 67, the connecting section 67 being at the radially inward pointing Side 68 of the seal carrier 55 has an opening 69 via which, for example, the sealing material can be injected into the grooves 65, 66 and the connecting section 67.
  • the engagement of the hook-like latching element 58 in the corresponding receptacle 59 on the bearing plate can also be seen.
  • the locking elements 58 can be made of plastic, for example, and be resilient, so that the seal carrier 55 can be clipped onto the bearing plate 12 and, in particular, also a preload in the first sealing section 63 for sealing against the bearing plate 12 is made possible.
  • the bearing plate 12 has a ramp-shaped section 98 in the axial direction in front of the receptacle 59, so that the hook-like or claw-like latching elements 58 spring up onto the bearing plate 12 in the axial direction when the seal carrier 55 is pushed on and then snap into the receptacle 59.
  • the radial position of the seal carrier 55 is defined by a cylindrical surface 100 of the bearing plate 12 and the cylindrical surface 101 of the seal carrier 55 resting against it.
  • the arrangement of the seal carrier 55 for holding the seal 56 has the advantage that the end shield 12 can be manufactured, for example, as a stamped sheet metal component.
  • the use of the separate seal carrier 55 makes it possible, on the one hand, to arrange an insulating material in the area that is particularly close to the stator or particularly close to the end winding 8, and thus the insulation between the stator 3 or the stator winding 5 and the end shield 12 to improve. For example, an axial distance and a radial distance between end winding 8 and end shield 12 of at least 2.5 mm can be maintained in this way.
  • the sealing distance between the axial seals on the sealing element 15 of the electrical machine 1 can be reduced, since the axial seal 56, or its first section 63, can be arranged closer to the end face 9 of the stator 3 with the aid of the seal carrier 55. since the arrangement is not influenced by a curvature of the end shield 12 in an area 70, which can occur due to the process during manufacture as a stamped sheet metal part.
  • the arrangement of a seal directly on the bearing plate 12 or in the curved section 70 of the bearing plate 12 can be avoided by the seal carrier 55 .
  • the pressure of the cooling medium in the wet space 13 can act on the outer diameter of the sealing element 15, which is designed, for example, as a can, causing it to bulge inward in the direction of the rotor 25 can incline.
  • the direction of this buckling is shown by arrow 102 in FIG.
  • the sealing points 103 and 104 are also shown, with the first sealing section 63 of the seal carrier 17 sealing against the sealing element 15 at the sealing point 103 and the first seal 31 of the conductor carrier 16 at the sealing point 104.
  • the axial position of the sealing points 103, 104 is in each case a dash-dotted line clarifies.
  • sealing from the radial outside is also conceivable.
  • the conductor carrier 55 includes a further seal 72 in addition to the seal 56 .
  • the seal 56 is designed as an O-ring, which is arranged in the groove 65 in the outer circumference of the seal carrier 55 .
  • the sealing of the seal carrier 55 in relation to the sealing element 15 in the interior of the stator 3 takes place via the seal 56 as described above.
  • sealing against the bearing plate 12 is effected by means of a further seal 72 which is correspondingly arranged in the radially inner groove 66 of the seal carrier 55 .
  • the further seal 72 is also designed as an O-ring, so that the connecting sections 67 communicatingly connecting the grooves 65, 66 can advantageously be dispensed with.
  • One of the recesses 62 can also be seen in the sectional illustration, which clearly enables the effect of a material thickness that is as homogeneous as possible in the cross section of the seal carrier 55 .
  • FIG. 12 shows a detailed view of the transmission connection element 18 .
  • the transmission connecting element 18 is preferably in the form of a hollow cylinder and is in the assembly position arranged concentrically around the longitudinal axis 6 extending in the axial direction of the electrical machine 1 .
  • the transmission connection element 18 On a first end face 73, the transmission connection element 18 comprises the annular or alternatively ring segment-shaped fastening section 20, via which the transmission connection element 18 is connected to the end face of the housing 2 and to the stator 3 along the fastening plane 19.
  • the housing 2 is fastened to the fastening plane 19 and for the stator 3 to be fastened to a further fastening plane (not shown).
  • Fastening on two fastening planes, in particular parallel to one another can be achieved, for example, by the fastening section 20 having two fastening surfaces which are axially offset from one another and on which the stator 3 and the housing 2 are arranged with an axial offset relative to one another and in particular along two parallel to one another and can be attached orthogonally to the axial direction extending attachment planes.
  • the transmission connection element 18 extends from the fastening plane 19 to the side of the fastening plane 19 opposite the housing 2 and here also the stator 3, as is shown, for example, in FIGS.
  • the fastening section 20 of the transmission connection element 18 protrudes radially inwards from a jacket 78 of the transmission connection element 18 which is in particular in the form of a hollow cylinder.
  • a plurality of openings 74 are provided in the fastening section 20 , via which the transmission connection element 18 can be connected to the housing 2 of the electric machine 1 by means of the screw connections 11 .
  • the bearing plate 12 can also be attached to the housing 2 via the screw connections 11 or the openings 74 .
  • the bearing plate 12 rests on the side 75 of the fastening section 20 opposite the fastening plane 19 and is thus arranged in the cavity inside the transmission connection element 18 or at least partially surrounded by the transmission connection element 18 .
  • a seal (not shown) can be arranged between the fastening section 20 and the bearing plate 12 .
  • the lateral surface of the jacket 78 is provided with the opening 27, in which, as described above, the connection element 26 designed as a coolant nozzle and optionally a sealing ring can be arranged.
  • the stator 3 of the electrical machine 1 is fastened to the fastening section 20 of the transmission connection element 18 via an adhesive connection via the end face 76 pointing to the fastening plane when the electrical machine 1 is in the assembled state.
  • the fastening section 20 of the transmission connecting element 18 can advantageously provide a flat fastening surface for the adhesive connection to the stator 3 , in particular to the insulating ring 21 on the end face at the second axial end 9 of the stator 3 .
  • the stator is arranged in a torque-proof manner inside the housing 2 of the electrical machine 1 by the adhesive connection with the fastening section 20 .
  • the fastening section 20 of the transmission connection element 18 thus ensures that the stator 3 of the electric machine 1 is supported against the torque.
  • this adhesive connection and a seal arranged between the end shield 12 and the fastening section 20 contribute to sealing off the wet space 13 from the rotor 25 and from the environment of the electric machine 1 .
  • the fastening section 20 also effects an axial positioning of the transmission connection element 18 on the housing 2 or on the stator 3.
  • the fastening section 20 comprises a plurality of spacer projections 77 on the side 76 facing the stator 3, which are arranged, for example, equidistantly around the circumference of the fastening section 20.
  • These spacing projections 77 are designed as nubs or the like, for example, and cause a defined gap to form on the attachment plane 19, so that an adhesive for the adhesive connection to the stator 3 can be introduced in a defined geometry and quantity between the attachment section 17 and the stator 3.
  • a plasma activation of the insulating ring 21 made of plastic can be carried out.
  • transmission connection element 18 To fasten a transmission to transmission connection element 18 and to fasten transmission drive element 18 and possibly the entire electric machine 1 to a third object such as a motor vehicle, transmission connection element 18 has a further fastening section 79 on the end face opposite fastening section 20. This protrudes radially outwards from the hollow-cylindrical jacket 78 of the transmission connection element 18 .
  • the further attachment section 79 comprises a plurality of openings 80 for receiving attachment means.
  • rivet nuts 81 can be provided in the openings 18 , which enable a transmission to be fastened to the transmission connection element 18 .
  • the multiple openings 80 of the further fastening section 79 are offset in the circumferential direction and are preferably arranged equidistantly.
  • the casing 78 of the transmission connection element 18 comprises a plurality of radial bulges 82 which each lie adjacent to the openings 74 of the fastening section 20 .
  • the further attachment section 79 includes additional attachment areas 84, via which the transmission connection element or the entire electric machine 1 can be attached to a third-party object such as a motor vehicle.
  • the additional attachment sections 84 each include an opening 85 in which a rivet nut 86 is also arranged.
  • the transmission connecting element 18 is made in particular from sheet metal, for example by means of deep-drawing or stamping. This enables simple production of the transmission connecting element 18, which can thus be produced separately from the housing 2, which is designed, for example, as a cast aluminum component. This facilitates the production of the electrical machine 1.
  • the sheet metal thickness of the transmission connecting element 18 can be between 1 mm and 5 mm, for example 3 mm.
  • FIG. 13 shows the transmission connection element 18 in the installed position on the housing 3 of the electric machine 1. Furthermore, the connecting element 26 inserted into the opening 27 is shown.
  • the bearing plate 12 is arranged inside the casing 78 of the transmission connection element 18 .
  • the end shield 12 is fastened via the screw connections 11 and the side 75 of the fastening section 20 arranged opposite the fastening plane 19.
  • a rotor shaft 87 which is guided through the opening 57 in the end shield 12 and is rotatably mounted there via the rotor bearing 71.
  • a transmission fastened to the electrical machine 1 via the transmission connection element 18 can be coupled to this rotor shaft 87 .
  • the housing 2 forms the starting point for a preferred assembly sequence of the electrical machine 1 , which can be seen, for example, with reference to FIG. 2 .
  • a stator subassembly comprising the stator 3, the stator winding 5, the insulating rings 21, 22, the centering sleeves 23, 24 and the sealing element 15 is first pushed axially into the housing 2 from a first direction. It is pushed in via the end face of the housing 2, which is shown on the left in FIG.
  • an adhesive preferably an epoxy resin, is applied to at least one of the two contact partners for the connection between the insulating ring 21 and the fastening section 20 of the transmission connection element 18 .
  • the transmission connecting element 18 is centered on the isolation ring 21 .
  • the transmission of the stator torque during operation of the electrical machine 1 can take place via the first adhesive connection between the stator core 4 and the insulating ring 21 to the insulating ring 21 and from there via the second adhesive connection to the attachment section 20 of the transmission connection element 18 acting as a thrust washer. From there, the stator torque can be passed on to the screw connection through the fastening means 11 and finally into the housing 2 as intended.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention se rapporte à une machine électrique comprenant un stator (3) et un support conducteur (16) disposé à une extrémité axiale (7) du stator (3). Le support conducteur (16) comprend une section d'étanchéité en forme d'anneau (29) et une section de support conducteur en forme d'anneau ou en forme de segment d'anneau (30), la section d'étanchéité (29) comporte un premier joint d'étanchéité (31) faisant face axialement au stator (3) et un second joint d'étanchéité (32) orienté axialement à l'opposé du stator (3), le premier joint d'étanchéité (31) est en contact avec un élément d'étanchéité (15) disposé sur le stator (3) et scellant le stator (3) contre un entrefer radialement adjacent (14), et au moins des sections du second joint d'étanchéité (32) sont en contact avec au moins un couvercle entourant au moins partiellement la section de support conducteur (30) et/ou l'extrémité axiale (7) du stator (3).
PCT/DE2022/100821 2021-11-29 2022-11-07 Machine électrique comprenant un stator et un support conducteur disposé à une extrémité axiale du stator WO2023093935A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280076912.XA CN118285045A (zh) 2021-11-29 2022-11-07 包括定子和布置在定子的轴向端部处的导体支承件的电机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021131197.7A DE102021131197B4 (de) 2021-11-29 2021-11-29 Elektrische Maschine umfassend einen Stator sowie einen an einem axialen Ende des Stators angeordneten Leiterträger
DE102021131197.7 2021-11-29

Publications (1)

Publication Number Publication Date
WO2023093935A1 true WO2023093935A1 (fr) 2023-06-01

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PCT/DE2022/100821 WO2023093935A1 (fr) 2021-11-29 2022-11-07 Machine électrique comprenant un stator et un support conducteur disposé à une extrémité axiale du stator

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Country Link
CN (1) CN118285045A (fr)
DE (1) DE102021131197B4 (fr)
WO (1) WO2023093935A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872743A (en) * 1958-02-20 1961-07-12 Sumo Pumps Ltd Improvements relating to submersible electric motors
US3742595A (en) * 1970-12-21 1973-07-03 Smith Corp A Method of manufacturing a submersible motor
EP1271747A1 (fr) * 2001-06-27 2003-01-02 E + A Elektromaschinen und Antriebe AG Refroidissement du stator d'un moteur à manchon d'entrefer
GB2500040A (en) * 2012-03-07 2013-09-11 Nidec Sr Drives Ltd Cooling of electrical machines
US20140139061A1 (en) * 2011-06-25 2014-05-22 Baumueller Nuernberg Gmbh Electric machine and can for the electric machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010018078U1 (de) 2010-12-23 2014-01-27 Avl Trimerics Gmbh Maschine mit Faserspaltrohr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872743A (en) * 1958-02-20 1961-07-12 Sumo Pumps Ltd Improvements relating to submersible electric motors
US3742595A (en) * 1970-12-21 1973-07-03 Smith Corp A Method of manufacturing a submersible motor
EP1271747A1 (fr) * 2001-06-27 2003-01-02 E + A Elektromaschinen und Antriebe AG Refroidissement du stator d'un moteur à manchon d'entrefer
US20140139061A1 (en) * 2011-06-25 2014-05-22 Baumueller Nuernberg Gmbh Electric machine and can for the electric machine
GB2500040A (en) * 2012-03-07 2013-09-11 Nidec Sr Drives Ltd Cooling of electrical machines

Also Published As

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CN118285045A (zh) 2024-07-02
DE102021131197B4 (de) 2023-09-21
DE102021131197A1 (de) 2023-06-01

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